Species commonly cultivated
Maidenia rubra Rendle (Kimberly Region and Northern Territory)
Annual, submersed. Monoecious or possibly dioecious. Stem elongate. Leaves cauline, evenly but densely crowded along stem, seemingly irregularly arranged but spiraling; leaf blade narrow, linear, filiform, with minute spines along margin. Inflorescence axillary, in clusters (whorls) along stem; spathe of 2 united bracts subtends flower(s); male spathe sessile, entire spathe detaching and opening at water surface, liberating numerous small, male flowers; female spathe subtends single flower, borne on pedicel that elongates until flower reaches water surface and opens. Sepals 3 (female flower only); petals absent. Seeds numerous, dispersal by seed.
commonly found in billabongs (ox-bow lakes), ephemeral streams, swamps, and floodplains
The sole species in this genus, Maidenia rubra is only rarely cultivated for the aquarium trade. Maidenia is closely related to Vallisneria L.